Pencil



E. WILD May 14, 1940.

PENCIL Filed April 20, 1959 y .4 Sheets-Sheet 1 M25) 55h/w w 4420451 Affi/5 E. WILD May 14, 1940.

PENCIL Filed April 20, 1939 4 Sheets-Sheet 4I2 In l:

E. WILD Mayl14, 1940.

rEncIL Filed April 20. 1939 4 Sheets-Sheet 3 nvenorf 4760 E. wl'LD May 14, 1940.

Plnen.

Filed April 20, 1939 4 SheetsSheet 4 F'Zy. 10.

Patented May14, 1940 l u v p lUNITED STATES PATENT. -ol-Flcs PENCIL Eugen Wild, Pforzheim, Germany, assigner to the firm Carl Emil Rui', Pforzheim, Germany Application April 20, 1939, Serial No. 268,854

AIn Germany December 13, 1938 5 Claims. (Cl. 1Z0-12) This invention relates to pencils of the kind, clamping head'mounted at the writingendof the in which the lead is advanced into writing posipencil holder. 1 is a threaded spindle projecting tion by pressing a button. into the rear end of` the pencil holder and serving In pencils of the kind described the leads adto advance the leadf. 9 is a pressure Vspring in- 5 vanced into writing position are returned into serted between the insert plate 3 and a collar l2 inoperative position by pressing the button to xed to one'end of theslotted tube III, which release the lead, which is then pushed back into can be advanced in the jacket I by exerting presthe sleeve by pressure exerted on the lead. When sure on the cap Il closing the rear end of the the lead is thus released, it is first imparted an jacket I. I3 is a c ollar iixed to the rear end of l yadvance movement whereby it will project farthe tube I0, which serves to guide same in f the l0 ther from the point of the pencil. Consequently, inner. sleeve 2. The movable tube In is formed when'the forcing back of the lead is not effected with four slits I4, I4 and I5, I5, extending from with care, the lead may break. In any case this the collar I2 to the collar I3 and being arranged way of returning the lead requires several acin pairs in diametrically opposite position. I6

u tions, i. e. pressing the button, pressing the point and I1 is avpair of levers suspended, as shown in ll of the lead on the table or' the like and forcing Fig. '7 by means of hooks 55 and 55, respectively, it back into the pencil by pressure. 'in radial notches of the collar I3, being secured It is an object of' my invention to avoid breaktherein by 8f ring 2| and PI'OjECtng into the SliS age and loss of leads and to render the return I4, I4 of the tube` I0. The other pair of levers zo movement simpler than was hitherto the case. I8, I9 (Fig. 1) is formed with rounded link heads 20 To this end, according to this invention, a sin- 22 projecting for oscillation into similarly shaped gle pressure device is made to advance into an notches ofthe ears 24 formed on a guide` piece operative position and return to an inoperative 25 xed to the penci 5 and arranged for displaceposition alternately, a lead holder arranged in ment in the slits I of the slotted tube I0.

the pencil sleeve for axial displacement, the lead In the movable tube Ill and on the lead holder 85 being adjusted in and advanced from the holder 5 isfurther arranged a slide 25 formed with 'a in any suitable manner, for instance by rotating Wide collar 21 at the front end and with a nart a threaded spindle. The lead holder, when 1n row collar 28 at the rear end. 29 is a pressure either of the two end positions, -is iixedly held spring encircling the slidel 25 and pressing a ao therein. ilanged ring 3I against the collar 28. l0

In the drawings affixed to this specification The threaded spindle .1 projecting into the and forming part thereof an embodiment of my screw thread 32 of the lead holder '5 carries at invention is illustrated by way of example. v its rear end a square head 33, which is guided for i In the drawings axial movement in a square sleeve 35 surrounded.

y Figs. 1-6 are axial sections of the device along by a tubular sleeve 34 and rlxed to the cap Il. $6

one pair of lockinglevers serving to alternately The tubular sleeve 34 rests with its conically conhold and release, the pencil holder; tracted front end 55 against a conicalseat 8l Figs. '1-12 are similar views, however in the formed in a tube 36 forming an extension of the planes of another pair of locking and releasing displaceable tube I0 projecting' from the collar 40 levers, l I3 and is enclosed in a sleeve 31 ixed to the tu- 4o Fig. 13 is a cross section on the line XIII- XIII bular extension 33. It can be withdrawn from in Fig. 1. this sleeve together with the spindle 1 for the Figs. 1-2 and '1-8 illustrate the positions of the insertion of a fresh lead into the lead holder 5.

two pairs of levers in the inoperative position. of I'he advancing of the lead l in the lead holder the pencil holder, While Figs. 3 and 9 show them 5 to make the point oi the lead project from the 45 in the operative position, l clampingfhead 5 is effected by rotating the cap Figs. 4-5 and 10-11 illustrate the positions of "II exactly as in an ordinary pencil. On the other the two pairs of leversin the operative position hand the advance and return of the pencil of the pencil holder, while Eiga. 6 and 12 show formed by the head 5, sleevev 5 and screw spindle 50, them in the inoperative position. a Y 1 and the vprojecting of the head 5 and lead l so Referring to the drawings and iirst to Fig. 1, from the point of the jacket i into writing posil is the outer jacket, 2 is the inner sleeve and tion-,and on the other hand the'returnmg of the 3 is an insert plate held near the end of the parts 5 and l into the inoperative position are inner sleeve, while 4 is a tube fixed in the plate en'ected by twice exerting pressure on thecapii. y3; 5 is the pencil holder, i being a self-closing During the rstpressing operation the pencil ad- I.x5

vances into writing position, after the second pressing operation it is returned into the inoperative position. These movementsl of the pencil 5 are brought about by the axially movable tube III, which is actedfupon by the spring 9, the slide 26 acted upon by spring 29 and the flanged ring 3| and thepairs of levers I6, I'I and I8, I9, as follows:

Following the rst pressure exerted on the cap II the tube I0 and the flanged ring 3| of the slide 26 are advanced against the action of springs 9 and 29, until the projecting ledges 39 fixed to the rear end of the tube 4 (Fig. '7) adjoin the stops formed in the slits I4 (Fig. 8). The pair of levers I6, I'I (Fig. 7) which is suspended from the collar I3 of the tube I0, accompanies this advance movement; in contrast thereto the pair of levers I8, I9 supported for oscillation in the guide piece 25 remains in its position 43 of lever I8 being withdrawn from behind the locking projection 44 formed on the tube 4 (Fig. 2). The anged ring acts on the projection 4I of the lever I8 only so far that the oscillatory movement of lever I8 just suilices to disengage its hook-shaped end 43 from the locking projection 44, however not so far that also the second stop is disengaged from the flange 21 of the slide 26. At this moment the compressed spring 29 of the slide 26 isfree to expand and, since the flangedring 3|, forming thez rearward abutment of the spring, rests against the stop 38 of tube I0, the front ange 21 of the slide 26 against the stop 45 of the lever I8, the levers I8, I9 which are forced inwardly by the leaf springs 46, and together with them the lead holder 5 xed to the guide piece 25 are now advanced until the hookshaped end 43 of lever I8 is forced inwardly by the leaf spring 46, being locked in front of the projection 44 (Fig. 3). 'Ihe pair of leversA I 8, I9 and the clamping head 6 projecting from the jacket I by the advancing lead holder 5 are retained in their advanced position by the locking action of the lever I8 in coaction with the projection 44. In contrast thereto, when the pressure on the cap II is interrupted, the tube I0 is rel turned by spring 9 into its initial position together with the levers I6, I'I (Fig. 4). During this return movement the ange I2 of the tube slides over the front ends of these levers, securing them against outward spreading movement, so that the hook 43 of lever I8 is absolutely prevented from being released by the locking projection 44, so that by means of the guide piece 25 also the lead holder 5 and its head 6 are securely held in the writing position. Since now the slide 26 with its anged ring 3| occupies the advanced position shown in Fig. 10, the lower ends 49 of vthe levers I6, I'I, which follow the return movement of. the tube I9, will not grip the ange 3| from below, but will retreat behind this flange, as shown in Fig. 10..

On the cap II being pressed for the second time, whereby the lead holder 5, head 6 and the advanced pair of levers I8, `I9 are caused to be withdrawn again, the tube I Il and flanged ring 3| of the slide 26 are advanced again. In this case, since the slide 26 is now in advanced position, the advancing of the flanged ring 3| is carried out by the bottom ends 49 of the -levers I6, I'I (Fig. 10). On the ilanged ring' 3| meeting the nose 4I on lever I8, the hook-shaped end 43 of this lever isv disengaged again from the locking member 44 (Fig. 5). Hereby the lever I8 and guide piece 25 are released and the anged ring 3| which during its advance had engaged the nose 42 of lever I9, now pushes the guide piece 25 with the levers I8, I9 and with the lead holder 5 back into the 'inoperative position under the action of the compression spring 29 (Fig. 6) since the slide 26 abuts against the rear end of tube 4 and in consequence thereof the spring 29 can expand only rearwardly. The return movement of the ilanged ring 3| under the influence of the spring 29 is not hindered by the levers I6, II, for these levers, after the flanged ring 3| is advanced in front of the nose 42 on lever I9, have been spread outwardly by their noses 50 meeting the projections 5I on the guide piece 25 (Fig. 1), until the flanged ring 3| is free to return. After the return of the ilanged ring 3|, which carries the lever I9 along by its nose 42, the ring 3| is again positioned behind the bottom ends of the levers I6, II (Figs. l1 and 12). These levers are forced back into their initial position by an annular spring 52. After the cam face 53 on the inner side of the end o'f lever I9 has met the flange 21 of slide 26, thereby disengaging the nose 42 from the ilanged ring 3| (Fig. 6), the slide 26 is carried back by the hook-shaped ends of the levers I6, I'I, under the expansion of the spring 9 (on the second pressure being interrupted), into its initial position (Fig. 7), the noses 56 now resting against the projections 5I and causing the levers I6 and II to be spread outwardly, so that on pressure being exerted again 'on the cap II, the flanged ring 3| is free to pass between the levers I6 and Il.

1- wish it to be understood that I do not desire to be limited to the exact details of construction shown and described for obvious modifications will occur to a person skilled in the art.

1. A pencil comprising in combination, a tubular outer shell or jacket, a'lead holder arranged in said shell for axial movement, means comprising two pairs of levers suspendedin said jacket for axial and krocking movement for locking said lead holder in said shell in two end positions, means axially displaceable on the rear end of said shell for exerting pressure on said locking means and a spring arranged to act on said locking means for causing said lead holder to advance into one and to recede into the other end position, respectively.

2. A pencil comprising in combination, a tubular outer shell or jacket, a`lead holder arranged in said shell for axial movement, means comprising two pairs of levers suspended in said jacket for axial and rocking movement, means for locking said lead holder in said shell in two end positions, means axially displaceable on the rear end of said shell for exerting pressure on said locking means and a. spring arranged to act on said locking means for causing said lead holder to advance into one and to recede into the other end position, respectively, one end of said spring abutting against the lead holder, while a member slidable on said lead holder abuts against the for axial and rocking movement, means for locking said lead holder in said shell in two endpositions, means axially displaceable on the rear end of said shell for exerting pressure on said locking said loc g means for causing said lead holder to advance into one and to recede into the other end position, respectively, one end of the spring abutting against the lead holder, while a member slidable on said lead holder abuts against the other end, a bearing fixed to said lead holder resting on said slidabie member and a pair ot levers suspended in said bearing forming part oi' the means for locking the lead holder.

4. A pencil comprising in combination, a tubular outer shell or Iiacket, a lead holderarranged in said shell for axial movement, means comprising two pairs. of levers suspended in said jacket for axial and rocking movement, means for locking said lead holder' in said shell in two end positions, means axially displaceable on the rear end of said shell for exerting pressure on said locking means and a spring arranged to act on said locking means for causing-said lead holder to advance into one and to recede into the other end position; respectively, the means for locking thel lead holder beine.r two pairs oi levers, a tube with ffour axial slots holding'one such pair of levers eans and a spring arranged to act on Ling two pairs of levers suspended in said vJacket for axial and rocking movementmeans for locking said lead holder in said shell in two end posi.-

tions, means axially displaceable on the rear end of said shell for exerting pressure on said locking meansand a spring arranged to act on said lockingmeans for causing said lead holder to ad-` vance into one and to recede into the other end position, respectively, the locking means compris-'- ing-two pairs oi' levers suspended ,in said jacket for axial and rocking movement, one lever ot'one end position.

end positions, while thev 

